| 摘要 |
A wooden composite "I" Beam 10 comprising upper and lower plywood flanges 11,12 interconnected by a web 13 comprising a pair of widely spaced apart planar side walls 25 26 formed from wood or wood derivative material. The cavity formed within the web 13 is filled with a core of cellular material 17 corrugated cardboard or paper which is adhered to the side walls and flanges using adhesive resin.
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